Impeached South Korean President Yoon Suk Yeol has defended his failed martial law bid by rehashing baseless claims of voter fraud, which has triggered a fresh wave of misinformation online targeting the National Election Commission (NEC).

Yoon Suk Yeol has gone to ground but remained unrepentant as the crisis has rolled on, issuing a defiant message to his base days before an arrest warrant expires on Jan 6.

South Korean law enforcement officials have requested a court warrant to detain impeached President Yoon Suk Yeol as they investigate whether his short-lived martial law decree this month amounted to rebellion.

President Yoon Suk Yeol Yoon imposed martial law in the middle of the night earlier this month, plunging South Korea into its worst political crisis in decades.

The once-vibrant democratic success story of Asia’s fourth-largest economy has been pushed into uncharted territory.

Protesters laid on the ground to impede police on Thursday, while members of his security team have blocked police raids in the stand-off.

Impeached South Korean President Yoon Suk Yeol was resisting arrest for a third day on Thursday after vowing to "fight" authorities seeking to question him over his failed martial law bid.

The suspended president of South Korea, Yoon Suk Yeol, is opposing the arrest warrant issued by the national judiciary. The court in Seoul seeks to take action against the current head of state in connection with his imposition of martial law in December.